What is the worldview of Rainer Maria Rilke and how is expressed in his poetry?

It is fair to say that Rainer Maria Rilke was a prolific poet concerned with the mystical, religious, artistic, and existential.
A major work of Rilke's is Das Stunden-Buc, or The Book of Hours—a three-part poem cycle in which the speaker presents himself as a monk. The poet was a religious seeker who struggled to conceive of God and man's impetus to live, and in the poems, he communicated how he grappled with the limitations of language to describe God.
Rilke later developed the object poem, a type of verse dedicated to the attempt to put into words the experience of a work of visual art.
Some of Rilke's last works are contained in Sonnets to Orpheus, a cycle of fifty-five sonnets inspired by the mythical characters of Orpheus and Eurydice and thematically concerned with the phenomenon of transformation and divinity.